Oven for burning refractories and the like



H. KOPPERS OVEN FOR BURNING REFRACTORIES AND THE LIKE Filed Aug. 51. 1921 Mar. 3. 1925.

YLT

Patented Mar. 3, 1925.

UNITEDl STATES ,I 1,528,555 lrarau'r OFFICE.

HEINRICH KOPPERS, OF ESSEN-EUHR, GERMANY, ASSIG-NOR T0 THE KOPPERS DE- VELOPMENT CORPORATION, OF PITTSBURGH, PENNSYLVANIA, A CORPORATION 0F PENNSYLVANIA. p f

OVEN FOR BURNING REFRACTORIES AND THE LIKE.

Application filed August 31, 1921. Serial No. 497,369.

(GRANTED UNDER. THE PROVISIONS 0F THE ACT 0F 3, 1921, 41 STAT. Il., 1313.)

To all whom t may concern:

Be it known that I, HEiNRroH -Korrnns (assignor to The Koppers Development Corporation, a corporation ofk Pennsylvania), a citizen of Germany, residing in Essen- Ruhr, Germany, have invented a new vand useful Improvement in Ovens for Burning Refractories and the like, of which the fol-` lowing is a specification. 4

The invention relates to ring furnaces for burning ceramic ware, lime, dolomite, and the like.

According to another invention of mine stead of preheating the lower opening is closed by a sand filling; on the emptying of the chambers containingV the fully burnt and cooled ware these sand seals are again opened from the side of the chamber by scooping or scraping them out. In this way it is possible to use actual sand seals, that is, seals whose formation and removal are effected without employing flaps, slides and the like; in other words, there are obtained closures resembling liquid seals, having no mechanism.

According to the present development this idea, so useful for the formation of these lower seals, is also adopted for the conveying ducts leading from the furnace cover to the side of the: chamber, whereby valves, flaps, slides and the like are dispensed with throughout the furnace structure and the operation carried on with sand seals or closures exclusively, which'are produced and destroyed corresponding to their nature and location. This is attained by the plan that through the openings or passages formerly required in the furnace roof at the upper ends of the conveying ducts, sand is now filled in, which falls into the bend of thev Channel around the intermediate partition and thereby forms a seal; by suitable formation of this cavity below the intermediate a vconstruction unified but also a simplification in operationis attained, since the handling of all vthe seals takes place according to the same rules.

In the accompanying drawing a constructional example of the subject matter of the invention is shown, for the purposes of illustration and explanation of the invention but not to limit the same to details, in which drawings y Fig. 1 is a vertical section of a portion of a ring furnace embodying the invention, on line I-I of F ig. 8.

Fig. 2 is a similar view on line IL-II of Fig. 3. F ig. 8 is a horizontal section on line IH-HIof Fig.f1.

Y TheA individual chambers 10 t0 be arrangedk in ring operation are charged through the openings 25 with fresh material,

and serve in turn as preheating, burning,

and cooling' chambers. The arrangement at any time is yeffected exactly asin my United States application Serial' No. 497,367 filed Augl, 1921. The direct passage of the gases from one chamber into the other takes place through cavities 18 made under the partitions 11, which when necessary can be lille'd from the top with sand through the passages 19. The sand can be scraped or scooped out as required, from both sides, to allow which operation the floor of the cavity 18 is suitably bevelled ed. The conveying ducts 13 leading from the furnace roof to the floor are also provided with cavity like bends 27 under the partition 11, which however dier from the cavities 18 byrbeing open on one side only. Through pipes 26 arranged in the partitions 1,1 sand l i can also be filled whenl necessary into the cavities 27 to form a seal here, which-can be again brokenl after opening the correof the cavities 2;?, to which is supplied the highly heated combustion air from the cooling,` ware. As can be seen from the plan, the channels l5 are always arranged alternately with the cavities 27 and thecavities 18 lso that a uniform distribution over the whole width of the burning` chamber is obtained.

What is claimed is`- l. A ring,` Jfurnace for burning ceramic ware and the like comprising a plurality of chambers, partitions separating said chambers, Vports at the lower ends of said partitions communicably connecting` the lower' portions of adjacent chambers, with each other, ducts communicating with each of said ports through which means may pass to shut off communication A through said portie, other, ports at the lower ends of said partitions, said` ports communicably connecting with an upwardly extending channel, said last mentioned ports andl channels communie-ably connecting'the lower portion of one' chamber with the upper portion of the next adjacent chaniber, ducts leading` to each of Saidlast mentionedchannels and ports through which nieansmaypass to shut oft' communication through saidports.

2. A ring furnaceA for burning ceramic ware and the like comprising` a plurality of chambers each adapted to preheat, burn and cool material, partitions separating` said chambers, ports at lthe lower endsv of said partitions communicably connecting the lower portions of adjacent chambers with each other, duets leading,- to each of said ports to facilitate closing orf said ports, otherI portsl at the lowerportions of said partitions, said ports communicahly connecting the lower portions of one chamber with an upiif'ardly extending. channel, the upper end of' said channel communicating with they upper portion ofan adjacent chambei` and ducts leading to saidchannel`and said last mentioned ports to facilitate closing` of said ports.

3. A ring` furnace for burning ceramic ware and the like comprising a plurality of chambers, partitions separat-ing said chambers, ports at the lowerv ends of said partitions communicably connecting the lower portions of adjacent chambers with each other, ducts communicating with each of said ports through which sand may pass to shut olf communication through said ports, other ports at the lower endsof said partitions, said ports communicably con# necting with an upwardly extending` channel,l said last mentioned ports and channels communicably connecting` the lower portiony of one chamber with the upper portion of the next adjacent chamber, ducts leading to eachof said last mentioned channels and ports through which sand may pass to shut off communication through said por-ts.

4r, ringI furnace for burning cer-amic ware and the like comprising a plurality of chambers each adapted to preheat, burn and cool material, partitions separating said chambers, portsV at the lower ends of said partitions communicably connecting the lower portions of adjacent chambers with cach other, sand ducts leading to each ot said ports to facilitate closing of said ports, other ports at the lower portions of said partitions, said ports communicably connecting thelower portions of one chamber with an upwardly extending channel, the upper end 'of said channel communicatingwith the upper portion of an adjacent chamber and sand ducts leading to said channel and said last mentioned ports to facilitate closing` of said ports..

In testimony whereof, I have hereunto set my hand th'isQGth day of July, 19:21.

HEINRICH KOPPERB. 

